Extensible 3D (X3D)
Part 1: Architecture and base components
3 Definitions, acronyms, and abbreviations
For the purposes of this part of ISO/IEC 19775, the following definitions apply.
cause a sensor node to generate an "isActive" event
a node which is an antecedent of another node in the transformation hierarchy
a person or agent that creates X3D files
See generator.
the abstract representation of the user in a X3D world
a straight line passing through the pointer location in the direction of the pointer
a node that may have many instances in a scene graph but only one instance may be active at any instant of time
a computer program that interprets X3D files, presents their content to a user on a display device, and allows the user to interact with worlds defined by X3D files by means of a user interface
nodes defined using the prototyping mechanism that are understood only by certain browsers
a node of a type explicitly defined in this part of ISO/IEC 19775
a function defined in a scripting language to which events are passed
an instance of a children node
one of a set of node types, instances of which can be collected in a group to share specific properties dependent on the type of the grouping node
a computer system, attached to a network, that relies on another computer (the server) for essential processing functions
a node used as a substitute for all of a Collision node's children during collision detection
characterization of a colour space in terms of explicit parameters
the process of identifying objects or parts of objects which do not need to be processed further by the browser in order to produce the desired view of a world
a node which descends from another node in the transformation hierarchy (a children node)
a graphics device on which X3D worlds may be rendered
a pointing device sensor that causes events to be generated in response to sensor-dependent pointer motions
a sensor node that generates events based on the location of the viewpoint in the world or in relation to objects in the world
a message sent from one node to another as defined by a route
A sequence of events initiated by a script or sensor event and propagated from node to node along one or more routes all of which are considered to have occurred simultaneously
the rules governing how events are processed by browsers and scripts
a field that is capable of receiving events via an eventIn to change its value(s), and generating events via an eventOut when its value(s) change
a prototype defined in an external file and referenced by a URL
a property or attribute of a node
the identifier of a field
a single rendering of a world on a display device or a single time-step in a simulation
a computer program which creates X3D files
a node defining the properties of a specific geometry node
a node containing mathematical descriptions of three-dimensional (3D) points, lines, surfaces, text strings and solids
receive events from activated pointing devices
one of a set of node types which include a list of nodes, referred to as its children nodes
a two-dimensional (2D) rectangular array of pixel values
the mechanism by which one X3D file is hierarchically included in another
a reference to a previously defined and named node
a node that defines a piece-wise linear interpolation
a private network that uses the same protocols and standards as the Internet
the amount of detail or complexity which is displayed at any particular time for any particular object
a linefeed character (0x0A) and/or a carriage return character (0x0D)
a sequence of events which would result in a specific event generator sending more than one event with the same timestamp
an integrated presentation, typically on a computer, of content of various types, such as computer graphics, audio, and video
set of interconnected computers
the fundamental component of a scene graph
a characteristic of each node that describes, in general, its particular semantics
a collection of data and procedures, packaged according to the rules and syntax defined in this part of ISO/IEC 19775. "Object" is usually synonymous with node.
a background texture that is placed behind all geometry in the scene and in front of the ground and sky
a node which is an instance of a grouping node
a location and direction in the virtual world defined by the pointing device with which the user is currently interacting with the virtual world
a hardware device connected to the user's computer by which the user directly controls the location and direction of the pointer
a sensor node that generates events based on user actions, such as pointing device motions or button activations
a piecewise linear curve
a named collection of criteria for functionality and conformance that defines an implementable subset of a standard
definition of a new node type in terms of the nodes defined in this part of ISO/IEC 19775
the mechanism for extending the set of node types from within a X3D file
the connection between a node generating an event and a node receiving the event
an ordered collection of grouping nodes and other nodes
a set of procedural functions normally executed as part of an event cascade
the process of creating or referring to a script
a system of syntactical and semantic constructs used to define and automate procedures and processes on a computer
a node that enables the user to interact with the world in the scene graph hierarchy
a UTF-8 character used to separate syntactical entities in an X3D file
a node which shares a parent with other nodes
the smallest time unit capable of being identified in a digital simulation of analog time
a grouping node that exhibits special behaviour (e.g., Switch or LOD)
an image used in a texture map to create visual appearance effects when applied to geometry nodes
the set of coordinates used to map a texture to geometry
a monotonically increasing value generated by a node
that part of an event that describes the time the event occurred and that caused the message to be sent
the subset of the scene graph consisting of nodes that have well-defined coordinate systems
a section of a PNG file containing transparency information (derived from 2.[I15948])
to process the nodes in a scene graph in the correct order
a person or agent who uses and interacts with X3D files by means of a browser
a location, direction, and viewing angle in a virtual world that determines the portion of the virtual world presented by the browser to the user
See world.
One or more consecutive occurrences of a separator character
a collection of one or more X3D files and other multimedia content that, when interpreted by a X3D browser, presents an interactive experience to the user consistent with the author's intent
the coordinate system in which each X3D world is defined
See browser.
a computer program that locates and transmits X3D files and supporting files in response to requests from browsers
a set of X3D nodes and statements as defined in this part of ISO/IEC 19775
the plane perpendicular to the Z-axis that passes through the point Z = 0.0
the plane perpendicular to the X-axis that passes through the point X = 0.0
the plane perpendicular to the Y-axis that passes through the point Y = 0.0
For the purposes of this part of ISO/IEC 19775, the following expansion of acronyms and abbreviations apply:
Hue, Saturation, and Value colour model. See E.[FOLE].
HyperText Markup Language (see 2.[HTML])
Joint Photographic Experts Group (see 2.[JPEG])
Musical Instrument Digital Interface. A standard for digital music representation (see 2.[MIDI])
Multipurpose Internet Mail Extension (see 2.[RFC2077])
Moving Picture Experts Group (see 2.[I11172-1])
Portable Network Graphics. A specification for representing two-dimensional images in files. See 2.[I15948].
the colour model used within ISO/IEC 19775 for the specification of colours.
Relative Uniform Resource Locator. See 2.[RFC1808].
Universal multiple-octet coded Character Set. See 2.[I16262].
Uniform Resource Locator. See 2.[RFC1738].
Universal Resource Name. See 2.[RFC2141].
the character set used to encode X3D files defined as the 8-bit UCS Transformation Format specified in 2.[I16262].